Computer freezes, needs hard restart

Computer freezes, monitor displays white screen with columns of horizontal lines (colors of last display) and one square of vertical lines. This happens 5-15 minutes after the desktop is displayed as I open folders, browse internet, etc. The thing is when it is idle after desktop is displayed, it does not freeze or anything.

you may be having a graphics card error, as you navigate with windows you may not be dumping your cards cach, as a result after a while it fills up and crashes, try updating its driver, post if it still dosent work

Hi there
Once you've cleaned your system inside check your fan's especially the one sitting on your cpu if its working properly.after doing the above do this:
with your tower case open(to monitor your fan continueselly to see if it bails on the.
system-cpu fan esp)start up your windows.
when logged in,immediately go to task manager end keep the window open to monitor processor activity.now, while monitoring cpu fan and processor performance you will be able to track if the problem lies with cpu,to rule it out as a possibility. before computer freezes see if the processor's performance went ski-rocketting and if fans stopped.
also post full system specs on next post
???

hi. thanks for the reply. the fans did not stop when computer freezes. it will not also freeze if it is in idle mode. unless i do some browsing, opening forlders or it's doing other processes like burning cd then that's the only time it shows white screen.

before you open or unplug anything look @ the back of your computer box and see where your monitor cable plugs in(the one with the pins-thats your signal cable)now that you've seen where it plugs in open your box and see from the inside if the connector (where the cable is connected to )if its actually soldered to your motherboard or is it on a seperate card

...so ill suggest you get a 'cheapie' of a graphics card install it and see how it behaves
dont buy one just find one for troubleshooting

good suggestion I also suggest a ram test program ,download iso and using a iso burning program burn iso to disk and boot computer to this program memtest 86.of course you will need to do this on andother computer because of your problems.
memtest86=http://memtest.org/#downiso
Image burn =http://www.imgburn.com/